Muntin and cross joint anchorage



NOV. 27, 1951 w, ss 2,576,840

MUNTIN AND CROSS JOINT ANCHORAGE Filed Nov. '7, 1946 2 SHEETSYSHEET l IHim INVENTOR.

m/ /d'pw AMATTO 15y Nov. 27, 1951 w. P. KESSLER 2,576,840

MUNTIN AND CROSS JOINT ANCHORAGE Filed Nov. 7, 1946 2 SHEETS-SHEET 2 I16 i I I I INVENTOR. Ward P (W Z1 17. 24 W luz ATTORNEY Patented Nov.27, 1951 MUNTIN AND oaoss JOINT ANCHORAGE Ward P. Kessler, Bristol,Ind., assignor to Victor M. Langsett, Chicago, 111., as trusteeApplication November 7', 1946, Serial No. 708,286

3 Claims.

This invention relates to improvements in means and methods of attachingand anchoring the muntins in a window sash to the cross and side railsof the sash, aswell as the muntins themselves where they cross oneanother.

The particular form and joinery of the cross and side rails of the sashare set forth in my co-pending application Serial No. 700,693 filedOctober 2, 1946.

The muntins are preferably made of formed metal or metal alloy sectionsby extrusion but it is readily apparent that any formed material,plastics for example, may be used.

An object of my invention is to provide means for joining the muntins ina window sash to the rails, and to themselves, where they cross, byadapting the contacting ends of the muntins to the adjacent contours ofthe rails and cross muntin, thereby interlockin the members, andimparting further rigidity to the structure, by mutilating or embossingan obtrusion on the rail or cross muntin adjacent to the muntin end.

Another object is to provide a mechanical assembly thereby avoidingwelding or brazing the members.

Another object is to permit the surface finishing of the muntins beforeassembly.

Another object is to provide an efficient and cost reducing method ofinstalling the muntins in the sash after the rails have been assembled.

A further object is to provide means for fastening the muntin endswithout affecting the structural strength of the sash rails and crossmuntins.

Further objects and advantages of the invention will be apparent fromthe following specification and the accompanying drawings, wherein apreferred embodiment of the invention has been shown and described.

In the drawings;

Figure 1 is a perspective view of a cross sash rail and vertical muntinjoined.

Figure 2 is a perspective view of the form and end treatment of themuntin.

Figure 3 is a side View of the muntin end shown in Figure 1.

Figure 4 is a side view of the cross sash rail and muntin in position,showing the method of mutilatin and distorting an obtrusion on the crossrail, thereby holding the muntin in place.

Figure 5 is a side view of the muntin end joinery taken at right anglesto the axis of the cross rail, which is shown in cross-section.

Figure 6 is similar to Figure 5, showing the mutilating and distortingof the obtrusion on the cross rail. 1

Figure 7 is a perspective view of a cross muntin and the upper verticalmuntin joined.

Figure 8 is a perspective view of a side sash rail and muntin endjoined, the muntin form varying from that shown in Figure 1.

Figure 9 is a side view of the structure shown in Figure 8, more clearlyshowing the mutilation and distortion of the obtrusion on the side rail.

Figure 10 is a top view of the muntin showin the end treatment.

Figure 11 is a top view taken at right angles to the axis of the siderail, which is shown in cross-section, showing the mechanical joinery.

Figure 12 is similar to Figure 11, more clearly showing the distortionof the obtrusion on the side rail adjacent to the muntin end.

The complete window sash has not been shown in the drawings, but itshould be obvious that any sash has a plurality of side rails and crossrails, usually two side rails and an upper and lower cross rail, themuntins which may be vertical or horizontal, or both, or, in someinstances, on the diagonal.

Similar numerals refer to throughout the several views.

Referring to Figures 1 to 6 inclusive, of the drawings, the sash crossrail I, substantially rectangular in cross-section, preferably with ahollow center, has one side wall with an inturned L-shaped elongation 2and the obtrusion 3 on the adjoining side wall nearest said elongation,the outside surfaces of said obtrusion 3 and the insimilar partsturnedlip of the elongation 2 bein substantially on the same plane, formingthe recess 4.

The vertical muntin to be attached to said rail I, an end portion ofwhich is shown at 5, has a base 6, the stem 1 and the head 8 with bothends inturned, forming a block letter T in crosssection.

The end surface of said muntin is formed at right angles to the axis ofthe muntin, so as to rest firmly upon the exterior face of the crossrail I, to which it is locked. To form the jointure means, a channel 9is formed in the head and inturned legs of 8 and the stem 1, at rightangles to the axis of said muntin, at a height, and to a depth and widthto accommodate and intimately embrace the inturned lip of the elongatedleg 2 of the rail I and another channel I 0 is formed in the inturnedlegs of the head 8 and the stem I, to a Width and depth to accommodateand intimately embrace the obtrusion 3 on the rail I. To assemble themuntin and rail, a portion of the obtrusion 3 of the rail I is removed ashort distance from the final position of the muntin, as at figures.

' at substantially right angles thereto. of these heads, 22, 22 areinturned, forming?! muntin is prevented by mutilating and distorting theobtrusion 3 on both sides of its point of contact with the stem 1 of themuntin 5, as at l2, l2, thereby firmly fixing it in position and addingrigidity to the structure.

Referring now to Fig. 1 for example, it-should be noted that theterminal edges of the legs or flanges on the sash rail and also on themuntinterminate in a common plane when assembled as shown in Fig. 1.Thus these edges provide planar surfaces against which the innersurfaces of flat planes of glass may be abutted, after which putty orother glazing compositions may then be applied tothe. juncture of theopposite surfaces of the glass and the adjoining surfaces of the muntinand sash rail, as is customary. The sheared notch ll and the swaged orupset portion l2 of the ridge 3 will of course be concealed by theglazing composition- It is obvious that similar joinery may be-used inattaching the muntins to other rails in the sash.-

,Where both horizontal and vertical muntins e used n the .sa h,,provision m st be made f r the cross joints. This form of joinery is shown inFigure 7. In the interest of structural strength, the horizontal muntinI3 is one continuous length. This muntin I 3 is of similar form to thevertical muntin 5, with the addition of the obtrusions I4, M, on bothsides of the stem I, thereby forming .a recess and arrangement similarto that Of the inturned leg 2 and obtrusion 3 of the rail I. The end ofthe vertical muntin section is formed and the assembly of the crossjoint is completed as described above, further movement of the verticalmuntin section being prevented by the mutilation of the obtrusion M onboth sides of the stem], as shown at I5, l5.

It is apparent from the foregoin description, that the muntins maybesurface finished and installed in the sash, frame after the rails havebeen assembled, thereby facilitating the manufacturing process.Furthermore, the interlocking of the prepared muntin ends with thecontours of the rails and cross-muntins, and mechanical immobilization,makes welding or brazing unnecessary, thereby substantially reducing thecost of the assembly. 7

Where diagonalmuntins are u d in a sash, it is obvious that similarmeans and methods described above may be used, the muntin ends, channels9 and 10 being formed on a bias to conform to the angles desired and theparticular sashdesign.

In Figures 8 to 12, inclusive, a form of muntin is shown varying fromthat disclosed in previous This form is adaptable where no cross muntinis used. One side of the side rail I6, has an elongated inturned leg 61,and the side adjacent thereto, an obtrusion l8, forming the recess I9,the exterior surfaces of the inturned lip of the leg I! and theobtrusion I8 being substantially in the same plane. The muntin has astem 2| with the heads 22 and 22' at each end thereof and The endsglazing support and recess for putty retention. The end surface of saidmuntin is formed at right angles to the axis of the muntin, so as torest firmly upon the exterior face of the side rail It, to which it islocked. To form the jointure means, a channel 23 is formed in the headand inturned legs, 22, and the stem 21, transverse to the axis of saidmuntin, at a height and to a. depth and width to accommodate andintimately embrace the inturned lipof the leg I? of the rail [6 andanother channel 24- is formed in the inturned legs of the head 22 andthe stem 2 I, to a depth and width to accommodate and intimately embracethe obtrusion I8 of the rail Hi. The muntin and rail are theninterlocked as hereinbefore described, the channels 23 and 24 conformingto and intimately embracin the inturned leg I! and obtrusion i8respectively, and mechanically held in position by the mutilation ordistortion of the obtrusion l8 on both sides of the muntin as indicatedat 25, 25,

While I have shown and described herein, for illustrative pu poses, apreferred and alternative embodiment of the invention and methods ofpracticing it, it should be understood that bone siderable variation inthe details of construction may be employed and the method varied,without departing from .the spirit and scope of the invention, as setforth in the following claims.

,I claim as .my invention:

1. In combination, an extruded rigid sash {1211 aving a vertical walland integral therewith a longitudinally extending inturned flangeperpendi ul r-t said e l. said rail having a second wall perpendicularto the first wall ,spaced from and parallel to said flange, an obtrusiononsaidseflond wallin the form of a longitudinally extending shearableridge projecting therefrom toward said flange but terminating shortthereof by a distance at l ase equal to h he ht o id ides. h ridge beingspaced from said first wall a distance equal to the thickness of thehead Wall of a muntin now to be mentioned, and an extruded muntin of Tform in cross section having a head wall and a web wall perpendicularthereto, said head wall having inturned marginal flanges, one end ofsaid muntin being seated on said rail second wall, the muntin near saidend having a transverseslot through its head wall portion proportionedto snugly yet slidably embrace the flange of said first rail wall andbeing notched at said end to slidably embrace said ridge while the endof the head Wall of the muntin extends into the recess between the ridgeand said first rail wall, a portion of the ridge located laterally ofthe final desired location of the muntin end being cut away flush withthe second rail wall to facilitate insertion of the notched end of themuntin between the ridge and first wall by lateral sliding movement ofthe muntin with said slot slidably ging said rail flange, the rail ridgebeing swaged against the muntin to lock the latter in fixed finalposition.

2. In combination, an extruded rigid sash rail having a vertical walland integral therewith a longitudinally extending inturned flangeperpendicular to said wall, said rail having a second wall perpendicularto the first Wall spaced from and parallel to Said flange, an obtrusionon said second wall in the form of a longitudinally extending shearableridge projecting therefrom toward said flange and underlying said flangeand spaced apart from said first wall, and an extruded muntin ofsubstantially block letter T form in transverse cross section, the Thead portion of S the muntin having inturned marginal flanges, one endof said muntin being seated on the second Wall, the muntin near said endhaving a transverse slot through its T head portion proportioned tosnugly yet slidably embrace the flange of said rail vertical wall andbeing vertically notched at said end to slidably embrace said ridgeWhile the end of the T head extends into the space between th ridge andsaid first wall, a portion of said ridge in an area located laterally ofthe final desired location of the muntin end being cut away flush withthe second Wall to facilitate insertion of the notched end of the muntinbetween the ridge and first wall by lateral sliding movement of themuntin with said slot slidably engaging said rail flange, and meansoperative to restrain movement of the muntin laterally relative to thesash rail.

3. In combination, an extruded rigid sash rail having a vertical walland integral therewith a longitudinally extending inturned flangeperpendicular to said wall, said rail having a second wall perpendicularto the first wall spaced from and parallel to said flange, an obtrusionon said second wall in the form of a longitudinally extending shearableridge projecting therefrom toward said flange and wholly underlying saidflange but terminating short thereof by a distance at least equal to theheight of said ridge, the ridge being spaced from said first wall adistance equal to the thickness of the head wall of a muntin now to bementioned, and an extruded muntin of T form in cross section having ahead wall and a web Wall perpendicular thereto, said head wall havinginturned marginal flanges, one end of said muntin being seated on saidrail second wall, the muntin near said end having a transverse slotthrough its head wall portion proportioned to snugly yet slidablyembrace the flange of said first rail wall and being notched at said endto slidably embrace said ridge while the end of the head wall of themuntin extends into the recess between the ridge and said first railwall, a portion 01 the ridge located laterally of the final desiredlocation of the muntin end being cut away flush with the second railwall to facilitate insertion of the notched end of the muntin betweenthe ridge and first wall by lateral sliding movement of the muntin withsaid slot slidably engaging said rail flange, the rail ridge beingswaged against the muntin to lock the latter in fixed final position,the terminal edges of said inturned flanges of the rail and muntin lyingin a common plane to constitute abutment surfaces against which glasspanes may be abutted. WARD P. KESSLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,101,745 Jones June 30, 19141,354,821 Garratt Oct. 5, 1920 2,377,427 Kessler June 5, 1945

